The most common and most likely answer to this crossword clue is the 6 letter word PEARLS
I've seen this crossword clue in The Daily Telegraph
P
E
A
R
L
S
More clues leading to the result PEARLS
- Jewels sparkle centrally in rings
- . Some nobility in priest’s words of wisdom?
- Rope, say, belted chaps with power
- Hands in vegetables which are precious
- Pawn nobleman’s gems
- Red lentil primarily forms part of pulses and granules
- Power to take peer's treasures
- Gems of quiet noblemen
- Bits of wisdom for Poland's first noblemen
- Granules left in fruit
Buddy explains!

The straight part
We know that "gems" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gems = pearls.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does PEARLS mean?
PEARLS noun- A shelly concretion, usually rounded, and having a brilliant luster, with varying tints, found in the mantle, or between the mantle and shell, of certain bivalve mollusks, especially in the pearl oysters and river mussels, and sometimes in certain univalves. It is usually due to a secretion of shelly substance around some irritating foreign particle. Its substance is the same as nacre, or mother-of-pearl. Round lustrous pearls are used in jewellery.
- Something precious.
- A capsule of gelatin or similar substance containing liquid for e.g. medicinal application.
- Nacre, or mother-of-pearl.
- A whitish speck or film on the eye.
- A fish allied to the turbot; the brill.
- A light-colored tern.
- One of the circle of tubercles which form the bur on a deer's antler.
- The size of type between diamond and agate, standardized as 5-point.
- A fringe or border.
- A jewel or gem.
- The clitoris.
- (sometimes figurative) To set or adorn with pearls, or with mother-of-pearl.
- To cause to resemble pearls in shape; to make into small round grains.
- To cause to resemble pearls in lustre or iridescence.
- To resemble pearl or pearls.
- To hunt for pearls
- To dig the nose of one's surfboard into the water, often on takeoff.